Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b25bba3b0dd6
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #28095 from rexboy7/1129386-targeted-context-menu

Bug 1129386 - [Stingray][System] Send keyboard events to only focused co.... r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/14cc8e3dfcc5
Author: Rex Lee <rexboy@mozilla.com>
Desc: Bug 1129386 - [Stingray][System] Send keyboard events to only focused context menu

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https://hg.mozilla.org/integration/gaia-central/rev/768562beb626
Author: Marina <marina.rodrigueziglesias@telefonica.com>
Desc: Merge pull request #27884 from autra/bug-1118884

Bug 1118884 - Correct text alignment in canvas for rtl texts.
r=marina

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https://hg.mozilla.org/integration/gaia-central/rev/7fa6d9732866
Author: Augustin Trancart <augustin.trancart@phoxygen.com>
Desc: bug 1118884 - Correct text alignment in canvas for rtl texts.

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https://hg.mozilla.org/integration/gaia-central/rev/bccadbe978e3
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #28091 from sean2449/Bug_1122429

Bug 1122429 - [Stingray] UI-Transition - Fly up animation for buttons in option menu, r=rexboy, r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/227b2bb267f5
Author: Sung Chiu <suchiu@mozilla.com>
Desc: Bug 1122429 - [Stingray] UI-Transition - Pop up option menu

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "e846bc37ade8eaad82a00ffda6eb34906dbcc07f", 
+        "git_revision": "74638231fa8ffb8cfeb643896f71e638b8b6ac03", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "1496e8693e4b28e8b923e7ca4b16420b86c88d64", 
+    "revision": "b25bba3b0dd666003e2e43a4657e559e4d97ce20", 
     "repo_path": "integration/gaia-central"
 }